%0 Journal Article
%A A. M. Il'in
%T Investigation of singularly perturbed boundary value problems by the method of matching asymptotic expansions
%J Differencialʹnye uravneniâ
%D 1985
%P 1760-1766
%V 21
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1985_21_10_a18/
%G ru
%F DE_1985_21_10_a18